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Profile Curvature derived from 1" SRTM DEM-S
Profile curvature is the rate of change of potential gradient down a flow line and represents the changes in flow velocity down a slope. It is significant for flow acceleration, erosion/deposition rates and geomorphology.
The profile curvature product was derived from the Smoothed Digital Elevation Model (DEM-S; ANZCW0703014016), which was derive... mored from the 1 arc-second resolution SRTM data acquired by NASA in February 2000. The calculation of profile curvature from DEM-S accounted for the varying spacing between grid points in the geographic projection.
This collection includes Profile Curvature data at 1 arc-second and 3 arc-second resolutions.
The 3 arc-second resolution product was generated from the 1 arc-second profile curvature product and masked by the 3” water and ocean mask datasets. less
Land Capability and Soil Degradation
Natural Resource Management
Soil Sciences not elsewhere classified
11 Feb 2000
22 Feb 2000
LAND Topography Models
1. 1 arc-second SRTM-derived Smoothed Digital Elevation Model (DEM-S; ANZCW0703014016).
2. 1 arc-second profile curvature product
3. 3 arc-second resolution SRTM water body and ocean mask datasets
Profile Curvature calculation
Profile curvature was calculated from DEM-S using the finite difference method (Gallant and Wilson, 2000). The different spacing in the E-W and N-S directions due to the geographic projection of the data was accounted for by using the actual spacing in metres of the grid points calculated from the latitude.
The profile curvature calculation was performed on 1° x 1° tiles, with overlaps to ensure correct values at tile edges.
The 3 arc-second resolution version was generated from the 1 arc-second profile curvature product. This was done by aggregating the 1” data over a 3 x 3 grid cell window and taking the mean of the nine values that contributed to each 3” output grid cell. The 3” profile curvature data were then masked using the SRTM 3” ocean and water body datasets.
Gallant, J.C. and Wilson, J.P. (2000) Primary topographic attributes, chapter 3 in Wilson, J.P. and Gallant, J.C. Terrain Analysis: Principles and Applications, John Wiley and Sons, New York.
Access to this data has been made possible by the Terrestrial Ecosystem Research Network (TERN), supported by the Australian Government through the National Collaborative Research Infrastructure Strategy and the Super Science Initiative.
Creative Commons Attribution 4.0 International Licence
Gallant, John; Austin, Jenet (2012): Profile Curvature derived from 1" SRTM DEM-S. v2. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2012.
The metadata and files (if any) are available to the public.
Terrain Analysis Research Team Leader
1181.2 TERN Facility No9 InfoGrid GRUNDY
The Soil and Landscape Grid of Australia is a comprehensive fine spatial resolution grid of functional soil attributes and key landscape features across Australia. The landscape attributes are derived from the data collected by the Shuttle Radar Topography Mission, whilst the soil attribute surfaces are modelled from existing soils information. The... morese surfaces provide a consistent base upon which a broad range of analyses can be conducted. This provides essential information, not previously available, that is needed for modelling and managing Australian landscapes and ecosystems. less
National Elevation and Terrain Datasets
SRTM-derived elevation and terrain covariate datasets at 1 second or 3 second resolution
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